Airtac MARU Stainless Steel Mini Cylinder MARU40X125S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU40X125S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø40mm bore and 125mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ40 mm
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting + cushion (up mount)
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
About the Airtac MARU Stainless Steel Mini Cylinder MARU40X125S
A 125 mm stroke at 40 mm bore gives the MARU40X125S room for real work: at 0.5 MPa it pushes 628 N and pulls 528 N, and at 0.7 MPa the push climbs to 880 N. The MAR body is double acting with a variable air cushion at both ends, and the up-mount front bracket is already part of the cylinder, so it bolts to the machine top face without a separate flange or foot.
Because the magnet is fitted as standard, CMSG, DMSG or EMSG switches clip on for end-of-stroke sensing with no special piston order. For sizing, treat 377 N (about 60 percent of the 628 N rating) as the realistic working force at 0.5 MPa, or count on roughly 32 kg of vertical lift with a 2:1 margin - enough for a small pallet clamp or a loaded slide.
Airtac MARU Stainless Steel Mini Cylinder MARU40X125S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU40X125S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting + cushion (up mount) |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MA-series datasheet. Barrel: stainless-steel tube (round-body, riveted rolling-packed construction); piston rod: carbon steel with 20µm hard-chrome plating; covers: aluminium alloy. Thread options: PT (blank) / G / NPT. Every MA-series cylinder ships with a built-in magnet for CMSG / DMSG / EMSG position sensors.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MARU Stainless Steel Mini Cylinder MARU40X125S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| U | Front-cover mount: U = up (top) mounting. |
| 40 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
MA-family variants: MA / MAC (double acting ±cushion), MSA / MTA (single acting push / pull), MAD / MACD (double rod ±cushion), MAJ / MACJ (adjustable stroke ±cushion), MAR (cushioned with integrated F/U mount). Mounting accessories: FA flange, LB foot, SDB pivot; plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MARU Stainless Steel Mini Cylinder MARU40X125S Is Used
Stopper gate on a packaging line
A 125 mm stroke extends a stopper blade under cartons moving at 30-800 mm/s cylinder speed; 628 N at 0.5 MPa easily holds a 30 kg carton stream against light conveyor backpressure.
Clamping fixture on a CNC jig
The up-mounted 40 mm body bolts under a milling fixture table; 377 N of working force clamps aluminum housings while the cushion takes the snap out of the close.
Lift-assist post for small hoppers
Pushing upward from the top bracket, the cylinder raises a 30 kg ingredient hopper with margin; the stainless barrel copes with daily washdown in a food plant.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU40X125S the Right Cylinder?
Step down to the 32 mm bore (402 N push at 0.5 MPa) if the load is under about 240 N, or step up to the 50 mm bore (981 N at 0.5 MPa) above 580 N. The MAR does not hold position when air is lost - the rod drifts - so add a rod lock if the load must stay put on power failure. Keep side loads off the 16 mm rod over the 125 mm travel; guide the load externally if the path is not perfectly aligned.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MARU Stainless Steel Mini Cylinder MARU40X125S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa the push rises to 879.6 N and the pull to 738.9 N. The theoretical maximum at 1.0 MPa is 128.1 kgf. It is double acting, runs on 0.15-1.0 MPa (22-145 psi) air and covers the 125 mm stroke at 30-800 mm/s.
Every MA-series cylinder ships with the piston magnet already installed, so CMSG, DMSG or EMSG reed switches mount straight onto the stainless barrel to signal rod position - no special-order piston and no extra option code.
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